Disease infection - simple probability

A disease is known to exist in 3.5% of a population. A test is 90% effective in detecting the disease, but has a 5% error-rate for "false" positive detection (an uninfected person tests positive). If the test is given to the entire population, what percent of the population would test:

A disease is known to exist in 3.5% of a population. A test is 90% effective in detecting the disease, but has a 5% error-rate for "false" positive detection (an uninfected person tests positive). If the test is given to the entire population, what percent of the population would test: